package concurrency; 
 // : concurrency/CaptureUncaughtException.java
import java.util.concurrent.*;

class ExceptionThread2 implements Runnable {
    public void run() {
        Thread t = Thread.currentThread();
        System.out.println("run() by " + t);
        System.out.println("eh = " + t.getUncaughtExceptionHandler());
        throw new RuntimeException();
    }
}


class MyUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
    public void uncaughtException(Thread t, Throwable e) {
        System.out.println("caught " + e);
    }
}


class HandlerThreadFactory implements ThreadFactory {
    public Thread newThread(Runnable r) {
        System.out.println(this + " creating new Thread");
        Thread t = new Thread(r);
        System.out.println("created " + t);
        t.setUncaughtExceptionHandler(new MyUncaughtExceptionHandler());
        System.out.println("eh = " + t.getUncaughtExceptionHandler());
        return t;
    }
}


public class CaptureUncaughtException {
    public static void main(String[] args) {
        ExecutorService exec = Executors.newCachedThreadPool(new HandlerThreadFactory());
        exec.execute(new ExceptionThread2());
    }
} /*
   * Output: (90% match)
   * HandlerThreadFactory@de6ced creating new Thread
   * created Thread[Thread-0,5,main]
   * eh = MyUncaughtExceptionHandler@1fb8ee3
   * run() by Thread[Thread-0,5,main]
   * eh = MyUncaughtExceptionHandler@1fb8ee3
   * caught java.lang.RuntimeException
   */// :~
